Ilizarov is a death/thrash metal band from Formosa, Goiás, Brazil, founded in mid-2014 by Danilo Rocha (guitar/vocals), Nel Dias (bass), and Veto (drums). Drawing on old-school death metal, punk, and rock and roll, the band has remained active in the Brazilian underground and released the album "Heal and Kill" in March 2025.

Imflawed is a groove/thrash metal band from Recife, Pernambuco, Brazil, formed in 2019 and comprising Arthur Santos (guitar/vocals), Jefte Felipe (lead guitar), Alisson Nascimento (bass/vocals), and Paulo Henrique (drums). The band released the live album "Live at Hellcife" in April 2021, recorded at L.A. Studios in Recife and featuring a tribute to local legends Chico Science e Nação Zumbi woven into the set.

Imminent Attack is a thrash/crossover metal band from Barueri, São Paulo, Brazil, formed in 2012. Their debut album "Deliver Us From Ourselves" (2012), produced at Casanegra studio, delivered fourteen tracks of high-speed thrash with D.R.I. and Suicidal Tendencies-influenced crossover edge, and featured a guest appearance by Pedro Poney of Violator on the track "St. Madness".

Imminent Doom is a black/thrash metal band from Rio de Janeiro, Brazil, formed in 2016. The band released their debut EP "Guerra Iminente" in October 2016, followed by the album "Ataque!" in December 2020. Their sound draws on the aggressive traditions of Brazilian black and thrash metal, delivered with raw, independent production.

Imperfecta is a heavy/thrash metal band from Rio de Janeiro, Brazil, whose concept was developed by guitarist Nilmon Filho over more than a decade before the official debut in 2021. The band released their debut album "Broken Humanity" in 2021, marking the formal arrival of a project long in gestation. Their music channels classic thrash metal aggression within the vibrant Rio de Janeiro heavy metal scene.

Incineracion is a thrash metal band formed in 2018 in Melipilla, Chile, self-described as a "rotten Thrash Metal band" rooted in aggression and speed. Their discography includes the Demo Tape 2018, the Tortura Mental EP (December 2018), the Odio y Vengaza full-length, and the 2023 single "Sangre impía."

Indisposed was an all-female thrash metal quartet from La Plata, Argentina, formed in 2013, with members Pely Macchi on vocals, Anahí Fernandez on guitar, Salo Astudillo on bass, and Laura on drums. The band released two EPs, "Hangover" (2015) and the self-titled "Indisposed" (2017), both rooted in classic 1980s thrash with high-energy tempos and sharp twin guitars.

Infectai is a speed/thrash metal and crust band from Florianópolis, Santa Catarina, Brazil, formed in 2012 by André (vocals), Murilo (drums), Aranha (guitar), and Sapo (bass). Drawing on the raw energy of 1980s punk and metal, the band writes music with explicitly critical content targeting contemporary economic and social systems. Their self-titled EP, released in October 2012, contains four tracks including "Frutos de Um Problema Social" and "Escravo do Inferno."

Infected Cells is a death/thrash metal band from Simões Filho, Bahia, Brazil. The band released their debut EP "Voices from the Hell" in 2018, recorded between 2015 and 2017 at WR Bahia Studios in Salvador, Bahia; the seven-track EP was later released on cassette in 2022. They followed it with the EP "This Is the End" (2020) and a live album documenting their appearance at Dopesmoke Festival in 2021.